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Volume 11
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Article

Activity of Aqueous Extracts from Native Plants of the Yucatan Peninsula against Fungal Pathogens of Tomato In Vitro and from Croton chichenensis against Corynespora cassiicola on Tomato

by
Felicia Amalia Moo-Koh
1,2,
Jairo Cristóbal-Alejo
2,*,
José María Tun-Suárez
2,
Irma Leticia Medina-Baizabal
1,
Alejandra Anahi Arjona-Cruz
2 and
Marcela Gamboa-Angulo
1,*
1
Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, Mérida 97205, Yucatán, Mexico
2
Tecnológico Nacional de México, Campus Conkal, Avenida Tecnológico s/n, Conkal 97345, Yucatán, Mexico
*
Authors to whom correspondence should be addressed.
Plants 2022, 11(21), 2821; https://doi.org/10.3390/plants11212821
Submission received: 12 September 2022 / Revised: 14 October 2022 / Accepted: 17 October 2022 / Published: 24 October 2022
(This article belongs to the Section Plant Protection and Biotic Interactions)
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Abstract

Plant extracts are a valuable alternative to control pathogens of horticultural crops. In the present study, four species of pathogenic fungi were isolated from leaf spots on Solanum lycopersicum and identified by traditional and molecular techniques as Alternaria alternata ITC24, Corynespora cassiicola ITC23, Curvularia lunata ITC22, and Fusarium equiseti ITC32. When 11 aqueous extracts from eight native plants of the Yucatan Peninsula were tested against the four fungi in vitro, the extract from Croton chichenensis roots was most active, inhibiting mycelial growth (79–100%), sporulation (100%), and conidial germination (71–100%) at 3% (w/v). A logarithmic–diagrammatic scale of the pathosystem C. cassiicola–S. lycopersicum was established and used to assess disease severity on inoculated tomato plants in a greenhouse after treatment with the aqueous extract from C. chichenensis roots at 12% (w/v). After 21 days, the disease severity was 57% lower than on the control without extract applied. This dose of the extract was not phytotoxic to tomato leaves and was compatible with the beneficial organisms Bacillus subtilis CBCK47 and Trichodema asperellum Ta13-17. The antifungal efficacy of C. chichenensis is highly promising for incorporation into integrated disease management of tomato crops.
Keywords: Alternaria alternata; biocontrol; Bonellia flammea; Curvularia lunata; Fusarium equiseti; leaf spot severity; plant extracts Alternaria alternata; biocontrol; Bonellia flammea; Curvularia lunata; Fusarium equiseti; leaf spot severity; plant extracts
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MDPI and ACS Style

Moo-Koh, F.A.; Cristóbal-Alejo, J.; Tun-Suárez, J.M.; Medina-Baizabal, I.L.; Arjona-Cruz, A.A.; Gamboa-Angulo, M. Activity of Aqueous Extracts from Native Plants of the Yucatan Peninsula against Fungal Pathogens of Tomato In Vitro and from Croton chichenensis against Corynespora cassiicola on Tomato. Plants 2022, 11, 2821. https://doi.org/10.3390/plants11212821

AMA Style

Moo-Koh FA, Cristóbal-Alejo J, Tun-Suárez JM, Medina-Baizabal IL, Arjona-Cruz AA, Gamboa-Angulo M. Activity of Aqueous Extracts from Native Plants of the Yucatan Peninsula against Fungal Pathogens of Tomato In Vitro and from Croton chichenensis against Corynespora cassiicola on Tomato. Plants. 2022; 11(21):2821. https://doi.org/10.3390/plants11212821

Chicago/Turabian Style

Moo-Koh, Felicia Amalia, Jairo Cristóbal-Alejo, José María Tun-Suárez, Irma Leticia Medina-Baizabal, Alejandra Anahi Arjona-Cruz, and Marcela Gamboa-Angulo. 2022. "Activity of Aqueous Extracts from Native Plants of the Yucatan Peninsula against Fungal Pathogens of Tomato In Vitro and from Croton chichenensis against Corynespora cassiicola on Tomato" Plants 11, no. 21: 2821. https://doi.org/10.3390/plants11212821

APA Style

Moo-Koh, F. A., Cristóbal-Alejo, J., Tun-Suárez, J. M., Medina-Baizabal, I. L., Arjona-Cruz, A. A., & Gamboa-Angulo, M. (2022). Activity of Aqueous Extracts from Native Plants of the Yucatan Peninsula against Fungal Pathogens of Tomato In Vitro and from Croton chichenensis against Corynespora cassiicola on Tomato. Plants, 11(21), 2821. https://doi.org/10.3390/plants11212821

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